21314243432 has 8 divisors (see below), whose sum is σ = 39964206450. Its totient is φ = 10657121712.

The previous prime is 21314243411. The next prime is 21314243537. The reversal of 21314243432 is 23434241312.

It can be written as a sum of positive squares in only one way, i.e., 20404979716 + 909263716 = 142846^2 + 30154^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 21314243395 and 21314243404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332140207 + ... + 1332140222.

Almost surely, 2^21314243432 is an apocalyptic number.

It is an amenable number.

21314243432 is a deficient number, since it is larger than the sum of its proper divisors (18649963018).

21314243432 is a wasteful number, since it uses less digits than its factorization.

21314243432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664280435 (or 2664280431 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

Adding to 21314243432 its reverse (23434241312), we get a palindrome (44748484744).

The spelling of 21314243432 in words is "twenty-one billion, three hundred fourteen million, two hundred forty-three thousand, four hundred thirty-two".